[wasm] Export version.

tfjs-backend-wasm/src/index.ts

@@ -17,3 +17,4 @@
 
 import './kernels/all_kernels';
 export {BackendWasm, setWasmPath} from './backend_wasm';
+export {version as version_wasm} from './version';

tfjs-backend-wasm/src/version_test.ts

@@ -0,0 +1,29 @@
+/**
+ * @license
+ * Copyright 2018 Google LLC.
+ *
+ * Use of this source code is governed by an MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT.
+ * =============================================================================
+ */
+
+// tslint:disable-next-line:no-require-imports
+const packageJSON = require('../package.json');
+import {version_wasm} from './index';
+
+describe('tfjs-core version consistency', () => {
+  it('dev-peer match', () => {
+    const tfjsCoreDevDepVersion =
+        packageJSON.devDependencies['@tensorflow/tfjs-core'];
+    const tfjsCorePeerDepVersion =
+        packageJSON.peerDependencies['@tensorflow/tfjs-core'];
+    expect(tfjsCoreDevDepVersion).toEqual(tfjsCorePeerDepVersion);
+  });
+
+  it('version.ts matches package version', () => {
+    // tslint:disable-next-line:no-require-imports
+    const expected = require('../package.json').version;
+    expect(version_wasm).toBe(expected);
+  });
+});